12986186 has 16 divisors (see below), whose sum is σ = 20195784. Its totient is φ = 6257664.

The previous prime is 12986153. The next prime is 12986203. The reversal of 12986186 is 68168921.

It can be written as a sum of positive squares in 4 ways, for example, as 7317025 + 5669161 = 2705^2 + 2381^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7586 + ... + 9138.

Almost surely, 2^12986186 is an apocalyptic number.

12986186 is a deficient number, since it is larger than the sum of its proper divisors (7209598).

12986186 is a wasteful number, since it uses less digits than its factorization.

12986186 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1705.

The product of its digits is 41472, while the sum is 41.

The square root of 12986186 is about 3603.6351091641. The cubic root of 12986186 is about 235.0501537741.

The spelling of 12986186 in words is "twelve million, nine hundred eighty-six thousand, one hundred eighty-six".